On-Site Calibration of Presses up to 80 Meganewtons (8000t)

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Large industrial presses necessitate measurement of forces in the meganewton range. A new product line of MN press force calibration sensors (Type 9931A...) with measuring ranges from 250 ... 2 000 t (2 500 ... 20 000 kN) has been developed to calibrate these large forces.

Several sensors can be combined to increase the maximum measuring range for a particular application and force level. For example, four press force sensors, each with a range of 2 000 t, can also be used in this way to calibrate presses with capacities in the range of 8 000 tonnes.

Several sensors can be combined to suit the application. The greater the number used the wider the maximum measuring range that can be covered. These sensors are supplemented with a selection of special accessories.

Like all piezoelectric force sensors from Kistler, the new press force calibration sensors are particularly compact for their extremely wide measuring range, which extends from a few kilonewtons to their full scale value. Their small size makes them relatively manageable and especially suitable for on-site quasistatic and dynamic measurement of compression forces. The sensors were designed for either vertical or horizontal mounting (for example, for monitoring the closing force of injection molding machines).

Their high rigidity makes them outstandingly robust and overload resistant, and they have a high natural frequency and interference immunity. Even after millions of load cycles fatigue is not a problem and frequent thermal cycling does not give rise to sensitivity drift. When correctly used their service life is virtually unlimited.

The sensors are standardly calibrated at 10 % intervals from 10 ... 100 % of full scale in order to also improve the accuracy of measurements performed in partial ranges.

A selection of special mounting accessories complements the actual sensors. Particularly noteworthy are the optional ta-pered flanges available to help optimize force transfer while reducing the pressure on the bed and bear of the press.

The modular design of the calibration sensor allows easy, problem-free replacement of worn or damaged parts, such as, for example, cover plates for the contact surfaces.

Advantages of the new series of sensors:

• Enormously wide (kilonewton to meganewton) compression force measuring range
• Calibrated from 10, 20, 30 ... 100 % of the measuring range as standard
• High overload capacity
• Manual handling possible
• Vertical and horizontal mounting possible
• Accessories available for optimal mounting and force transfer

Kistler Group

Kistler’s core competence is the development, production and use of sensors for measuring pressure, force, torque and acceleration. Kistler’s know-how and electronic systems can be used to prepare measuring signals for use in analyzing physical processes, controlling and optimizing industrial processes, improving product quality in manufacturing and improving performance in sports and rehabilitation.

Kistler offers a comprehensive range of sensors and systems for engine development, automotive engineering, plastics and metal processing, installation technology and biomechanics.

A worldwide sales presence in the form of 19 group companies and 30 distributors ensures customer proximity, application support on an individual level and short lead times.

With a staff of more than 800, the Kistler Group is one of the world’s leading providers of dynamic measuring instrumentation. The Kistler Group achieved turnover of 160 million Swiss Francs in the 2005 financial year.